|The supernova remnant NGC 6960 (Veil nebula, Cirrus nebula) in the constellation
Cygnus on August 12 / 13, 2015. Discovered by the German-born British astronomer William Herschel in 1784, this cloud of heated and ionized
gas is the result of a supernova which exploded some 5000-8000 years ago. The nebula is 1470 light-years from earth. The brightest star
in the image is 52 Cygni. It is a foreground star (206 ± 8 light-years from earth) which can be seen by the naked eye (source: Wikipedia).
Twenty-two 3 minute exposures at ISO 800 with no dark frame subtraction were stacked with Deep Sky Stacker (resulting in a 1 h 16 min exposure)
and further processed in Photoshop.
|Equipment: Canon EOS 450D Baader modified camera, TeleVue Paracorr Type II coma corrector,
16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform,
Lacerta MGEN autoguider, Lacerta off axis system (field of view comparison:
image of the moon with the same equipment).